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Myeloid derived suppressor cells

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https://www.readbyqxmd.com/read/29785656/how-to-measure-the-immunosuppressive-activity-of-mdsc-assays-problems-and-potential-solutions
#1
Annika M Bruger, Anca Dorhoi, Gunes Esendagli, Katarzyna Barczyk-Kahlert, Pierre van der Bruggen, Marie Lipoldova, Tomas Perecko, Juan Santibanez, Margarida Saraiva, Jo A Van Ginderachter, Sven Brandau
Myeloid-derived suppressor cells (MDSC) are a heterogeneous group of mononuclear and polymorphonuclear myeloid cells, which are present at very low numbers in healthy subjects, but can expand substantially under disease conditions. Depending on disease type and stage, MDSC comprise varying amounts of immature and mature differentiation stages of myeloid cells. Validated unique phenotypic markers for MDSC are still lacking. Therefore, the functional analysis of these cells is of central importance for their identification and characterization...
May 21, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29779041/the-potential-importance-of-myeloid-derived-suppressor-cells-mdscs-in-the-pathogenesis-of-alzheimer-s-disease
#2
REVIEW
Antero Salminen, Kai Kaarniranta, Anu Kauppinen
The exact cause of Alzheimer's disease (AD) is still unknown, but the deposition of amyloid-β (Aβ) plaques and chronic inflammation indicates that immune disturbances are involved in AD pathogenesis. Recent genetic studies have revealed that many candidate genes are expressed in both microglia and myeloid cells which infiltrate into the AD brains. Invading myeloid cells controls the functions of resident microglia in pathological conditions, such as AD pathology. AD is a neurologic disease with inflammatory component where the immune system is not able to eliminate the perpetrator, while, concurrently, it should prevent neuronal injuries induced by inflammation...
May 19, 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29776955/high-fat-diet-induced-inflammation-accelerates-prostate-cancer-growth-via-il6-signaling
#3
Takuji Hayashi, Kazutoshi Fujita, Satoshi Nojima, Yujiro Hayashi, Kosuke Nakano, Yu Ishizuya, Cong Wang, Yoshiyuki Yamamoto, Toshiro Kinouchi, Kyosuke Matsuzaki, Kentaro Jingushi, Taigo Kato, Atsunari Kawashima, Akira Nagahara, Takeshi Ujike, Motohide Uemura, Maria Del Carmen Rodriguez Pena, Jennifer B Gordetsky, Eiichi Morii, Kazutake Tsujikawa, George J Netto, Norio Nonomura
OBJECTIVE: High-fat diet (HFD) could induce prostate cancer progression. The aim of this study is to identify mechanisms of HFD-induced prostate cancer progression, focusing on inflammation. MATERIALS AND METHODS: We administered HFD and celecoxib to autochthonous immunocompetent Pb-Cre+; Pten(fl/fl) model mice for prostate cancer. Tumor growth was evaluated by tumor weight and Ki67 stain, and local immune cells were assessed by flow cytometry at 22 weeks of age...
May 18, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29774578/the-immunobiology-of-rankl-and-myeloid-derived-suppressor-cell-activation-in-igg4-related-sclerosing-cholangitis
#4
Min Lian, Qixia Wang, Xiang Jiang, Jun Zhang, Yiran Wei, Yanmei Li, Bo Li, Weihua Chen, Haiyan Zhang, Qi Miao, Yanshen Peng, Xiao Xiao, Li Sheng, Weici Zhang, Jingyuan Fang, Ruqi Tang, M Eric Gershwin, Xiong Ma
The primary function of myeloid derived suppressor cells (MDSCs) is reflected in their immune modulatory role in several immune-mediated diseases. In IgG4-related disease (IgG4-RD), it has been hypothesized that there are selective regulatory defects that lead to a Th2 bias immune response. Herein we have taken advantage of a large cohort of patients with IgG4-related sclerosing cholangitis (IgG4-SC), the most common extra-pancreatic involvement of IgG4-RD, as well as controls consisting of primary sclerosing cholangitis (PSC), autoimmune hepatitis (AIH) and healthy volunteers, to study MDSC...
May 18, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29774034/targeting-vegf-vegfr-to-modulate-antitumor-immunity
#5
REVIEW
Ju Yang, Jing Yan, Baorui Liu
In addition to the crucial role in promoting the growth of tumor vessels, vascular endothelial growth factor (VEGF) is also immunosuppressive. VEGF can inhibit the function of T cells, increase the recruitment of regulatory T cells (Tregs) and myeloid-derived suppressor cells (MDSCs), and hinder the differentiation and activation of dendritic cells (DCs). Recent studies have investigated the role of antiangiogenic agents in antitumor immunity, especially in recent 3 years. Therefore, it is necessary to update the role of targeting VEGF/VEGFR in antitumor immunity...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29770434/tumor-yap1-and-pten-expression-correlates-with-tumor-associated-myeloid-suppressor-cell-expansion-and-reduced-survival-in-colorectal-cancer
#6
Rong Yang, Ting-Ting Cai, Xiao-Jun Wu, Yi-Na Liu, Jia He, Xiao-Shi Zhang, Gang Ma, Jiang Li
The expansion of myeloid-derived suppressor cells (MDSCs) correlates with tumorigenesis in colorectal cancer (CRC). Here, we found a significant association between CD33+ MDSC number and YAP1 and PTEN levels in CRC patients (P < 0.05). Moreover, the CD33+ MDSCs, YAP1 and PTEN were identified as predictors for the prognosis of CRC patients (P < 0.05). Notably, CD33+ MDSCs were an independent survival predictor for CRC patients through a Cox model analysis. In vitro data determined that the expression levels of YAP1 and PTEN in CRC-derived cell lines were associated with CRC-derived MDSC induction, and the blockade of YAP1 and PTEN decreased CRC-derived MDSC induction...
May 16, 2018: Immunology
https://www.readbyqxmd.com/read/29765990/immunosuppressive-role-of-myeloid-derived-suppressor-cells-and-therapeutic-targeting-in-lung-cancer
#7
REVIEW
Jie Ma, Huaxi Xu, Shengjun Wang
Lung cancer is the leading cause of cancer death worldwide due to its late diagnosis and poor outcome. Immunotherapy is becoming more and more encouraging and promising in lung cancer therapy. Myeloid-derived suppressor cells (MDSCs) are the main tumor suppressor factors, and the treatment strategy of targeting MDSCs is gradually emerging. In this review, we summarize what is currently known about the role of MDSCs in lung cancer. In view of the emerging importance of MDSCs in lung cancer, the treatment of targeting MDSCs will be useful to the control of the development and progression of lung cancer...
2018: Journal of Immunology Research
https://www.readbyqxmd.com/read/29763854/inhibition-of-pregnancy-associated-granulocytic-myeloid-derived-suppressor-cell-expansion-and-arginase-1-production-in-preeclampsia
#8
Yinan Wang, Yanhou Liu, Chang Shu, Jiya Wan, Yanhong Shan, Xinyi Zhi, Liguang Sun, Huanfa Yi, Yong-Guang Yang, Jin He
Myeloid-derived suppressor cells (MDSCs) expand in maternal peripheral blood and cord blood during normal pregnancy to maintain maternal-fetal tolerance. Here we investigated the expansion and function of MDSCs in preeclampsia (PE) patients. Maternal peripheral blood mononuclear cells (PBMCs) and cord blood mononuclear cells (CBMCs) were sampled from healthy pregnant women and PE patients, and analyzed for the frequencies and phenotypes of MDSCs and T cells. Serum levels of key human MDSC effector enzymes were measured using appropriate detection kits...
June 2018: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29762501/immunomodulatory-function-of-myeloid-derived-suppressor-cells-during-b-cell-mediated-immune-responses
#9
REVIEW
Bilgenaz Özkan, Heejin Lim, Sung-Gyoo Park
Myeloid-derived suppressor cells (MDSCs) play roles in immune regulation during neoplastic and non-neoplastic inflammatory responses. This immune regulatory function is directed mainly toward T cells. However, MDSCs also regulate other cell populations, including B cells, during inflammatory responses. Indeed, B cells are essential for antibody-mediated immune responses. MDSCs regulate B cell immune responses directly via expression of effector molecules and indirectly by controlling other immune regulatory cells...
May 15, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29760693/treatment-intensification-in-hiv-infected-patients-is-associated-with-reduced-frequencies-of-regulatory-t-cells
#10
Eva M Grützner, Tanja Hoffmann, Eva Wolf, Elke Gersbacher, Ashley Neizert, Renate Stirner, Ramona Pauli, Albrecht Ulmer, Jürgen Brust, Johannes R Bogner, Hans Jaeger, Rika Draenert
In untreated HIV infection, the efficacy of T cell responses decreases over the disease course, resulting in disease progression. The reasons for this development are not completely understood. However, immunosuppressive cells are supposedly crucially involved. Treatment strategies to avoid the induction of these cells preserve immune functions and are therefore the object of intense research efforts. In this study, we assessed the effect of treatment intensification [=5-drug antiretroviral therapy (ART)] on the development of suppressive cell subsets...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29758930/the-potential-predictive-value-of-circulating-immune-cell-ratio-and-tumor-marker-in-atezolizumab-treated-advanced-non-small-cell-lung-cancer-patients
#11
Minglei Zhuo, Hanxiao Chen, Tianzhuo Zhang, Xue Yang, Jia Zhong, Yuyan Wang, Tongtong An, Meina Wu, Ziping Wang, Jing Huang, Jun Zhao
BACKGROUND: The PD-L1 antibody atezolizumab has shown promising efficacy in patients with advanced non-small cell lung cancer. But the predictive marker of clinical benefit has not been identified. OBJECTIVE: This study aimed to search for potential predictive factors in circulating blood of patients receiving atezolizumab. METHODS: Ten patients diagnosed with advanced non-small cell lung cancer were enrolled in this open-label observing study...
May 4, 2018: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29757351/m10-a-novel-derivative-of-myricetin-prevents-ulcerative-colitis-and-colorectal-tumor-through-attenuating-robust-endoplasmic-reticulum-stress
#12
Feng Wang, Zhi-Yu Song, Xian-Jun Qu, Feng Li, Liang Zhang, Wen-Bao Li, Shu-Xiang Cui
Chronic gut inflammation disposes to an increased risk of colitis-associated cancer (CAC). Chemoprevention is an attractive complementary strategy. We aimed to evaluate the chemopreventive effects of M10, a novel derivative of Myricetin, in the murine azoxymethane (AOM)/dextran sodium sulfate (DSS) model. Oral administration of M10 at 50-100 mg/kg once a day for consecutive 12 weeks significantly prevented ulcerative colitis and colorectal tumor. Pathological analysis of intestines showed that M10 reduced the degree of chronic inflammation and prevented the progression of colorectal tumorigenesis...
May 11, 2018: Carcinogenesis
https://www.readbyqxmd.com/read/29755693/exosomes-in-melanoma-a-role-in-tumor-progression-metastasis-and-impaired-immune-system-activity
#13
REVIEW
Marco Tucci, Francesco Mannavola, Anna Passarelli, Luigia Stefania Stucci, Mauro Cives, Franco Silvestris
Exosomes (Exo) are small vesicles produced by melanoma cells and the accessory cells of the tumor microenvironment. They emerge via both classical and direct pathways and actively participate in tumor colonisation of distant tissues. The proteins, nucleic acids, cytokines and growth factors engulfed by Exo are transferred to recipient cells, where they drive numerous functions required for the tumor escape from immune system control and tumor progression. By positively or negatively modulating immune cell properties, Exo provoke immune suppression and, in turn, defective dendritic cell (DC) functions...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29755647/autologous-tumor-cells-bacillus-calmette-gu%C3%A3-rin-formalin-based-novel-breast-cancer-vaccine-induces-an-immune-antitumor-response
#14
María José Godoy-Calderón, Víctor Salazar, Eglys González-Marcano, Ana Federica Convit
Autologous cancer cell vaccines represent a multivalent patient-specific treatment. Studies have demonstrated that these immunotherapies should be combined with immunomodulators to improve results. We tested in breast cancer the antitumor effects of a 200 µg autologous tumor cells homogenate combined with 0.0625 mg of bacillus Calmette-Guérin (BCG), and 0.02% formalin. We used a 4T1 murine model of BALB/c receiving four weekly injections of either this vaccine or control treatments. The control treatments were either Phosphate Buffer Saline, BCG treated with formalin, or the tumor cells homogenate plus BCG alone...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29754506/hirsutella-sinensis-inhibits-lewis-lung-cancer-via-tumor-microenvironment-effector-t-cells-in-mice
#15
Huiying Fu, Lu Jin, Xia Shao, Yuanyuan Li, Fangming Chen, Zhiqiang Shou, Xiaofang Tang, Bing Ji, Qiyang Shou
Hirsutella sinensis fungus (HSF) is an artificial substitute of the well-known medicine Cordyceps sinensis with similar beneficial effects in humans. We previously found that HSF can regulate immune function and inhibit tumor growth; however, the mechanisms involved in these effects were still unclear. Accordingly, in this study, we investigated the effects of HSF on immune cell subsets in the tumor microenvironment in mice. The results showed that HSF inhibited Lewis lung cancer growth, alleviated abnormalities in routine blood tests, and enhanced tumor-infiltrating T cells, particularly the proportion of effector CD8[Formula: see text] T cells...
May 13, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29753730/expression-and-significance-of-peripheral-myeloid-derived-suppressor-cells-in-chronic-hepatitis-b-patients
#16
Y Lv, M Cui, Z Lv, J Lu, X Zhang, Z Zhao, Y Wang, L Gao, N M Tsuji, H Yan
BACKGROUND: Myeloid-derived suppressor cells (MDSCs) exert their suppressive effects on multiple immune response and contribute to the development of many diseases. However, limited data is available on the involvement of MDSCs in human chronic HBV infection. OBJECTIVE: To investigate whether the progression of chronic HBV infection was associated with imbalance of MDSCs. METHODS: The percentages of MDSCs, regulatory T (Treg), Th1 and Tc1 cells in the peripheral blood from chronic hepatitis B (CHB) patients and healthy controls (HC) were determined by flow cytometry...
May 9, 2018: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/29752314/ifnar1-controls-autocrine-type-i-ifn-regulation-of-pd-l1-expression-in-myeloid-derived-suppressor-cells
#17
Wei Xiao, John D Klement, Chunwan Lu, Mohammed L Ibrahim, Kebin Liu
Tumor cells respond to IFN-γ of activated T cells to upregulate programmed death-ligand 1 (PD-L1) in the tumor microenvironment as an adaptive immune resistance mechanism. Tumor cells also express oncogene-driven PD-L1. PD-L1 is also expressed on myeloid-derived suppressor cells (MDSCs). It is known that both type I and II IFNs upregulate PD-L1 expression in MDSCs. However, the molecular mechanism underlying PD-L1 expression in MDSCs is still largely unknown. We report in this article that MDSCs exhibit constitutive STAT1 phosphorylation in vitro without exogenous IFNs, indicating a constitutive active JAK-STAT signaling pathway in mouse MDSCs in vitro...
May 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29752311/myeloid-derived-suppressor-cells-impair-b-cell-responses-in-lung-cancer-through-il-7-and-stat5
#18
Yong Wang, Cara C Schafer, Kenneth P Hough, Sultan Tousif, Steven R Duncan, John F Kearney, Selvarangan Ponnazhagan, Hui-Chen Hsu, Jessy S Deshane
Myeloid-derived suppressor cells (MDSCs) are known suppressors of antitumor immunity, affecting amino acid metabolism and T cell function in the tumor microenvironment. However, it is unknown whether MDSCs regulate B cell responses during tumor progression. Using a syngeneic mouse model of lung cancer, we show reduction in percentages and absolute numbers of B cell subsets including pro-, pre-, and mature B cells in the bone marrow (BM) of tumor-bearing mice. The kinetics of this impaired B cell response correlated with the progressive infiltration of MDSCs...
May 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29752277/the-highly-metastatic-nature-of-uterine-cervical-endometrial-cancer-displaying-tumor-related-leukocytosis-clinical-and-preclinical-investigations
#19
Tomoyuki Sasano, Seiji Mabuchi, Katsumi Kozasa, Hiromasa Kuroda, Mahiru Kawano, Ryoko Takahashi, Naoko Komura, Eriko Yokoi, Yuri Matsumoto, Kae Hashimoto, Kenjiro Sawada, Eiichi Morii, Tadashi Kimura
PURPOSE: The aim of this study was to investigate the metastatic potential of uterine cervical and endometrial cancer displaying tumor-related leukocytosis (TRL). EXPERIMENTAL DESIGN: Clinical data on uterine cervical (N=732) and endometrial cancer (N=900) were collected, and the metastatic potential of TRL-positive cancer was evaluated in univariate and multivariate analyses. Tumor and blood samples obtained from cervical cancer patients, cervical cancer cell lines, and a mouse model of cervical cancer were employed to examine the mechanisms underlying the highly metastatic nature of TRL-positive cancer, focusing on tumor-derived granulocyte-colony stimulating factor (G-CSF) and the myeloid-derived suppressor cells (MDSC)-mediated premetastatic niche...
May 11, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29748897/myeloid-derived-suppressor-cells-mdscs-in-patients-with-solid-tumors-considerations-for-granulocyte-colony-stimulating-factor-treatment
#20
REVIEW
Katerina Pilatova, Beatrix Bencsikova, Regina Demlova, Dalibor Valik, Lenka Zdrazilova-Dubska
Myeloid-derived suppressor cells (MDSCs) have been shown to contribute to tumor escape from host immune surveillance and to cancer progression by production of tumor-promoting soluble factors. Granulocyte colony-stimulating factor (G-CSF) is a principle cytokine controlling granulocyte number. Recombinant human G-CSF (rhG-CSF) has become the main therapeutic agent for the treatment of neutropenia and prophylaxis of febrile neutropenia in cancer patients. However, we show here that rhG-CSF triggers accumulation of granulocytic and monocytic subsets...
May 10, 2018: Cancer Immunology, Immunotherapy: CII
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